I am going over in the next few weeks so may be able to tell you more after that however there are so many choices. Boudoir, Adam and Eve etc… are all well established and London based. Another great one I’m told is Visions …very classy and they have a great wardrobe.
Another one with popular reviews is TVAMC who do great stuff and are very reasonably priced. Sophies is located in Bath and has been established for years. I’m going there myself for a session. In Blackpool Stephanies is well known as a great service and very well priced…. handy if you were considering going to Manchester.
I suggest you get on the tvchix sites as they have a list of many makeover services.
So there are so many and it depends what you are looking for and what sort of money you want to spend….but where-ever you go ..ENJOY!!!